masking tape on the board

well the last time i was here i was asking about shipping stuff, not that you'd remember, but anyway, now i have masking tape on the bottom of my board (which, not coincedently now has a nice 3 inch dink on both sides of my right rail). someone suggested to me to throw some lighter fluid on that and burn it off, but what do you guys think?
also any guesses on how much it'd cost to repair the stated ding? is it a DIY job?
also any guesses on how much it'd cost to repair the stated ding? is it a DIY job?